SynthesisInternational journal of environmental research and public health2021
A Meta-Analysis of the Efficacy of Hyaluronic Acid Eye Drops for the Treatment of Dry Eye Syndrome.
Synthesis in International journal of environmental research and public health, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 53 papers, 3 of them syntheses that pooled it.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
53 citing papers in PubMed, 3 syntheses or guidelines pooled it, 93 citations in OpenAlex.
- Evidence map for randomized controlled trials of treatment of acupuncture and moxibustion for dry eye disease.Frontiers in medicine · 2026Pooled it
- British Society for Rheumatology guideline on management of adult and juvenile onset Sjögren disease.Rheumatology (Oxford, England) · 2025Guideline
- Topical diquafosol versus hyaluronic acid for the treatment of dry eye disease: a meta-analysis of randomized controlled trials.Graefe's archive for clinical and experimental ophthalmology = Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie · 2023Pooled it
- A randomized crossover trial: The impact of ocular lubrication on migraine severity in persons with dry eye disease and migraine.Optometry and vision science : official publication of the American Academy of Optometry · 2025Trial
- A Prospective, Crossover, Randomized, Double-Blind Clinical Study Comparing the Effectiveness and Ocular Comfort of 0.1% Hyaluronic Acid and 0.3% Hyaluronic Acid in Patients With Dry Eye Disease.Clinical ophthalmology (Auckland, N.Z.) · 2025Trial
- Effectiveness of cyclosporine nanoemulsion eye drops in patients with mild-to-moderate dry eyes: objective and subjective evaluation.BMC ophthalmology · 2024Trial
- Cationic nanoemulsion vs. 0.15% sodium hyaluronate artificial tears in the healing process following modern surface keratorefractive surgery.European journal of ophthalmology · 2023Trial
- The Effect of Sodium Hyaluronate Eye Drops 2, 4 or 6 Times a Day on Signs and Symptoms of Dry Eye Disease.Clinical ophthalmology (Auckland, N.Z.) · 2023Trial
- An In Vitro Evaluation of the Effect and Protection of Artificial Tear Formulations on Human Corneal Epithelial Cells in Normal and Dry Eye Disease States.Pharmaceutics · 2026Article
- Practical Guide to the Local Treatment of Sjogren's Disease.Journal of clinical medicine · 2026Review
- Adverse effects of antiglaucoma medications: pathophysiology and novel drug delivery strategies for mitigation.International ophthalmology · 2026Review
- Dual crisis: environmental and economic unsustainability in NHS dry eye prescribing.BMJ open ophthalmology · 2026Article
- Management of Dry Eye Disease with Artificial Tears Containing Hyaluronic Acid and Trehalose: A Narrative Review.Clinical ophthalmology (Auckland, N.Z.) · 2026Review
- Improving the post-oculoplastic tear film: trehalose as a critical adjunct.International journal of ophthalmology · 2026Article
- Impact of Lid Wipes and Tear Substitutes on Symptoms and Signs of Ocular Surface Disease After Cataract Surgery-A Real-Life Study.Journal of clinical medicine · 2025Article
- The effect of molecular weight of hyaluronic acid on corneal cell viability.Scientific reports · 2025Article
- Post-market Surveillance Analysis of Refractive Data in Users of Delivery TyroOphthalmology and therapy · 2025Article
- Executive summary: British Society for Rheumatology guideline on management of adult and juvenile onset Sjögren disease.Rheumatology (Oxford, England) · 2025Article
- Article
- Comparative Performance of Artificial Tear Drops Assessed with Objective Non-Invasive Imaging.Clinical ophthalmology (Auckland, N.Z.) · 2025Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
4 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Hyaluronic acid (HA) is commonly used for treating dry eye syndrome (DES). This meta-analysis was performed to compare the efficacies of HA- and non-HA-based eye drops, including saline and conventional artificial tears (ATs), for the treatment of dry eye disease. Eight databases (PubMed, EMBASE, Cochrane Central Register of Controlled Trials, DBpia, KoreaMed, KMBASE, RISS, KISS) were searched for studies comparing the efficacies of HA- and non-HA-based ATs in patients with DES published up to September 2020. Two independent reviewers assessed the quality and extracted the relevant data. The mean differences of Schirmer's (SH) test scores, tear breakup times (TBUT), corneal fluorescein staining scores (Oxford scale, 0-4), and ocular surface disease indexes were calculated. The standard mean difference and 95% confidence interval were calculated using a random effect model. Nineteen studies, including 2078 cases, were included. HA eye drops significantly improved tear production compared with non-HA-based eye drops (standard mean difference (SMD) 0.18; 95% confidence interval (CI) 0.03, 0.33). In a subgroup analysis, the SH test scores and TBUT values after using HA significantly increased compared to those measured after using saline (SMD 0.27; 95% CI 0.05, 0.49 and SMD 0.28; 95% CI 0.03, 0.52, respectively). Based on these results, HA eye drops may be superior to non-HA eye drops including normal saline and ATs. Further research is needed to assess the efficacies stratified by age, treatment duration, the severity of dry eye, and optimal dosages.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.